The feeling of déjà vu one often experiences upon meeting someone one has friended or Facebooked, but has never actually met in person.

Person A: "I feel like I've met you before."
Person B: "Yeah. I feel the same way."
Person A {struck by a strong realization}: "Oh! Do you have Facebook?"
Person B {struck with similar sense as Person A}: "Yes I do. That's where I know you from!"
Person A: "Dude! We totally just experienced the Facebook Effect!"
Person B: "Crazy!"

The Facebook Effect is to know instant in-depth social information about a person. The personal information that can be disclosed includes birthday, hometown, relationship status, siblings, mutual and all other friends, favorite music, movies, and books, home and cell phone numbers, past schools and job places, along with photos and videos.

Would it affect your interest in perusing a person based on if they had a facebook or not?
Is the "Facebook Effect" hindering or improving our chances with a more suitable mate?